| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power consumption amount calculation technology capable of calculating a total amount of power consumption while protecting privacy relevant to the power consumption amount tallied by each power meter. <P>SOLUTION: A data management device is connected to a plurality of power meters tallying a power consumption amount of electric equipment, an energy management device and an application server. The data management device calculates a second code message by encrypting at least either of the followings so as to be decodable with the application server: the power consumption amount tallied by the power meter or a first code message which is the encrypted power consumption amount so as to be decodable by the application server. Then, the data management device calculates a first total amount of the power consumption amount using the power consumption amount tallied by each of a plurality of the power meters, calculates a code message of a second total amount of the power consumption within a predetermined period of time, sends the first total amount of the power consumption amount to the energy management device, and sends the code message of the second total amount to the application server. <P>COPYRIGHT: (C)2012,JPO&INPIT |
